87results about How to "Reduce internal heat" patented technology

A lighting fixture utilizing LED light sources for illumination of commercial, outdoor and other large area applications incorporates efficient heat dissipation and improved convective air flow. An integrated heat transfer assembly is disclosed that is configured to enhance heat dissipation by providing an efficient thermal conductive pathway for radiation of heat to an external environment. The lighting fixture body is configured with a lens body and heat sink having a chimney tube with internally facing finned heat sink arrangement for providing enhanced convective air flow through the light fixture body. When the heat sink transfers heat from the LED light sources during operation so as to create heated air surrounding the heat sink, ambient air is drawn through the chimney and the heated air is exhausted through air gaps so as to create a conductive air current with the environment. The heat sink fins are configured to enhance the natural air draw through the chimney by tapering the surface areas of the fins.

A permanent magnet (PM) machine has a reconfigurable fault condition mechanism disposed solely within a stator core portion, wherein the mechanism is automatically reconfigurable to reduce fault currents associated with the PM machine during a fault condition. The reconfigurable fault condition mechanism is automatically reconfigurable to also reduce internal heat associated with the PM machine during a fault condition. A method of reconfiguring the fault condition mechanism upon detection of a fault condition includes the steps of 1) selecting the reconfigurable fault condition mechanism from a) a plurality of rotatable magnetically anisotropic cylinders disposed within stator core slots, b) a plurality of ferrofluid-fillable cavities associated with stator core slots, and c) a sliding shield within the stator core; and 2) reconfiguring the fault condition mechanism to automatically reduce fault currents associated with the PM machine upon detection of a fault condition.

A permanent magnet (PM) machine has a fault condition mechanism disposed within a back iron of the stator portion, the mechanism operational to automatically reduce fault currents associated with the PM machine during a fault condition. The fault condition mechanism disposed within the stator back iron is reconfigurable to automatically reduce internal heat associated with the PM machine during a fault condition. A method of reconfiguring the PM machine upon detecting a fault condition includes the steps of 1) selecting the reconfigurable fault condition mechanism from a) a plurality of magnetically anisotropic rotatable cylinders, b) a plurality of ferrofluid-filled cavities, and c) a dual-phase material selectively embedded within the stator core; and 2) reconfiguring the fault condition mechanism to automatically reduce fault currents or internal heat associated with the PM machine upon detection of a fault condition.

A permanent magnet (PM) machine includes a plurality of reconfigurable fault condition mechanisms disposed within a stator core portion, the plurality of reconfigurable fault condition mechanisms together automatically reconfigurable to reduce fault currents and internal heat associated with the PM machine during a fault condition. The plurality of reconfigurable fault condition mechanisms are disposed solely within the stator core portion according to one embodiment to automatically reduce stator winding fault currents and internal heat associated with the PM machine during a fault condition. A method of reconfiguring the fault condition mechanisms upon detecting a fault condition includes the steps of 1) selecting the plurality of reconfigurable fault condition mechanisms from a) a plurality of rotatable magnetically anisotropic cylinders disposed both within a stator back iron and stator slot openings, and b) a plurality of rotatable magnetically anisotropic cylinders disposed within a stator back iron and a sliding shield disposed with a stator slot opening portion of the stator core, and 2) reconfiguring the plurality of fault condition mechanisms together to automatically reduce fault currents associated with the PM machine upon detection of a fault condition.

The invention discloses a rust removing and polishing device for steel plate machining. The rust removing and polishing device comprises a workbench, supporting legs, an adjusting plate, hydraulic cylinders and a motor. The adjusting plate is arranged in an installation groove. The two sides of the adjusting plate are rotationally connected to the side walls of the installation groove through a rotary shaft. The hydraulic cylinders are fixedly installed below the front end and the rear end of the adjusting plate. A horizontal polishing column and a rust removal roller are arranged above the adjusting plate. The workbench is covered with an outer cover. A brush plate is fixedly installed at the lower ends of supporting rods. A fan is installed at the top of the outer cover. According to the rust removing and polishing device, the adjusting plate is inclined by adjusting the hydraulic cylinders, so that the distance between the adjusting plate and the polishing column as well as the distance between the adjusting plate and the rust removal roller are adjusted, a steel pipe is polished and subjected to rust removal, the steel plate is pushed to move on the adjusting plate so that corresponding operation can be conducted, the labor intensity of workers is relieved, the processing efficiency of the steel plate is improved, the steel plate can be polished and subjected to rust removal through the device, the space in a plant is saved, and operation cost is reduced.

A dual resonance circuit is formed of two transformers, two resonance inductors and two resonance capacitors for a resonance type switching power supply employing parallel connected transformers. The secondary winding of the transformer is configured in a center tap structure, and a top and bottom symmetrical voltage multiplying rectifier is connected to the secondary winding coupled with the parallel connected transformers, thereby obtaining the same effect as when one transformer is used. The present invention achieves a low loss in the typical resonance type half bridge power supply even though two transformers are employed, and the switching power supply with a lowered height and thinned structure can be provided with the aid of the optimized arrangements of the resonance devices. The internal power loss can be lowered by using two parallel connected transformers as compared to a resonance type switching power supply which employs one transformer.

The invention discloses a graphene ultralow-temperature power lithium battery. The power lithium battery comprises a battery case, a negative electrode insulation sheet, a battery cell, a positive electrode insulation sheet and a cap. The battery cell comprises a positive electrode plate, a negative electrode plate and a diaphragm. The positive electrode plate comprises a positive electrode current collector, and positive electrode material coatings arranged on two side surfaces of the positive electrode current collector respectively; each positive electrode material coating is prepared by coating the surface of the positive electrode current collector with a positive electrode material mixture; and the positive electrode material mixture contains a nanoparticle positive electrode material, a positive electrode binder, a positive electrode mixed conductive agent and a positive electrode solvent, wherein the nanoparticle positive electrode material is a lithium iron phosphate nanoparticle, and the positive electrode mixed conductive agent contains, by weight, 97-99 parts of a positive electrode conductive agent base material, 0.2-0.4 parts of graphene, 0.2-0.4 parts of SP and 0.2-0.4 parts of KS-6.

The invention belongs to the technical field of organic polymer material products and in particular relates to a polyurethane elastomer printing rubber roller and a preparation method thereof. The polyurethane elastomer printing rubber roller is prepared from the following raw materials in parts by weight: 0.8-1.2 parts of polyalcohol, 0.25-0.4 part of polyisocyanate, 0.1-0.2 part of curing agent, and 0.00001 part of reaction control agent, wherein polyalcohol is polyester polyalcohol 218. The invention further provides the preparation method of the polyurethane elastomer printing rubber roller. The preparation method comprises the following steps of: preparing a prepolymer and a curing component at first; and pouring to obtain the polyurethane elastomer printing rubber roller. According to the invention, the processing technology is simplified, so that mixing, forming and vulcanizing of materials are integrated; the printing and dyeing rubber roller prepared by the invention is good in solvent resistance, easy for machining and good in elasticity; in the aspect of solvent resistance, the printing and dyeing rubber roller prepared by the invention is 2 times of other rubber rollers; the surface smoothness of the printing and dyeing rubber roller prepared by the invention can be up to the mirror state; the service life of the printing and dyeing rubber roller prepared by the invention is 2-3 times that of other rubber rollers; the service life of the general printing and dyeing rubber roller is 36 hours; and the service life of the printing and dyeing rubber roller prepared by the invention is about 80 hours.

The invention belongs to the technical field of high polymer composites, and particularly relates to a high-brightness polyphenylene sulfide alloy and a preparation method of the alloy. In order to solve the problems that a color of the existing high-brightness polyphenylene sulfide product is changed at high temperature and the color stability is poorer, the high-brightness polyphenylene sulfidealloy comprises the following materials by weight percentage: 30-40wt% of polyphenylene sulfide resin, 2-10wt% of heterogeneous resin, 17.5-57.1wt% of white inorganic mineral powder, 10-30wt% of glassfiber, 0.2-0.5wt% of an antioxidant, 0.4-1wt% of a coupling agent and 0.3-1wt% of a lubricant. A modified material is high in brightness and heat resistance and excellent in forming processability, and can be used for electric products, automobile structure parts and decoration materials.

The invention discloses a graphene modified lithium ion battery and a manufacturing method therefor. The battery comprises a battery case, a negative electrode insulation sheet, a positive electrode insulation sheet, a battery cell and a cap. The battery cell comprises a positive electrode plate, a negative electrode plate and a diaphragm. The positive electrode plate comprises a positive electrode current collector and a positive electrode material coating, wherein the positive electrode material coating is prepared by coating the surface of the positive electrode current collector with a positive electrode material mixture; and the positive electrode material mixture contains a nanoparticle positive electrode material, a positive electrode binder, a positive electrode mixed conductive agent and a positive electrode solvent. The negative electrode plate comprises a negative electrode current collector and a negative electrode material coating, wherein the negative electrode material coating is prepared by coating the surface of the negative electrode current collector with a negative electrode material mixture. The positive electrode mixed conductive agent contains, by weight, 97-99 parts of a positive electrode conductive agent base material, 0.2-0.4 parts of graphene, 0.2-0.4 parts of SP, 0.2-0.4 parts of KS-6.

The invention discloses a 1,5-naphthalene diisocyanate type polyurethane elastomer and a preparation method and application thereof. The 1,5-naphthalene diisocyanate type polyurethane elastomer comprises a component A and a component B, and the mass ratio of the component A to the component B is 100:21.5-22.5; the component A is prepared from, by weight, 100-105 parts of polycaprolactone polyol and 26-28 parts of polyisocyanates, the content of isocyanate groups of polycaprolactone polyol is 6% by mass, the hydroxyl value is 109-115 mg KOH/g, and the polyisocyanates is 1,5-naphthalene diisocyanate; the component B is prepared from, by weight, 60-65 parts of polycaprolactone polyol with the hydroxyl value being 109-115 mg KOH/g, 35-40 parts of 1,4-butanediol and 2 parts of organic tin catalyst; trundles manufactured from the elastomer can be used for high dynamic load and continuous high-speed running and heat resisting occasions, and can be adopted as heavy type high-end forklift driving wheels and bearing wheels, and the effect is remarkable.

The invention discloses an intelligent high-low voltage distribution switch cabinet, and belongs to the technical field of distribution switch cabinets. The intelligent high-low voltage distribution switch cabinet comprises a cabinet body, wherein the bottom of the left side of an inner cavity of the cabinet body is fixedly connected with a motor case; the right side of the inner cavity of the motor case is fixedly connected with a first motor; an output shaft of the first motor is fixedly connected with a first fan; an exhaust hole is formed in the bottom of the left side of the cabinet body; the bottom of the left side of the cabinet body is fixedly connected with a blast blower; the middle part of the inner cavity of the cabinet body is fixedly connected with a cross bar; the middle part of the cross bar is fixedly connected with a second motor; and the output shaft of the second motor is fixedly connected with a second fan. Through coordination of the third motor and a threaded rod, the rotating effect of the threaded rod is achieved; through coordination of the threaded rod and a threaded bushing, so that the effect of adjusting up-and-down motion of the threaded bushing is achieved; and through coordination of the second motor and the second fan, the exhaust and heat dissipation effects of the second fan are finally achieved, the internal heat of the cabinet body is reduced, the work efficiency of equipment is improved and operation of a system is ensured.

The invention discloses a polyolefin polyol modified thermoplastic polyurethane elastomer which comprises the following components in parts by weight: 20-30 parts of polyolefin polyol, 30-40 parts ofpolyester/ether polyol, 20-40 parts of diisocyanate, and 5-20 parts of a chain extender. The invention also discloses a preparation method of the polyolefin polyol modified thermoplastic polyurethaneelastomer. The material provided by the invention has the advantages of excellent wear resistance, high hardness, rich elasticity, good mechanical strength, excellent oil resistance and excellent oxidation resistance of a thermoplastic polyurethane elastomer, and also has the characteristics of excellent low-temperature performance, excellent hydrolysis resistance and small dynamic heat generationof polyolefin rubber.

The invention relates to a polyurethane elastomer for a fine wear-resistant screen mesh and a preparation method of the polyurethane elastomer. The polyurethane elastomer disclosed by the invention is characterized in that a nano-silicon powder additive is added in a reaction process; the average particle diameter of nano-silicon powder in the additive is smaller than or equal to 200 nm; free diisocyanate in a prepolymer is effectively removed by utilization of a scraper film evaporator at a later stage of prepolymer synthesis; the weight content of the diisocyanate is smaller than 0.1 percent; an antioxidant and an ultraviolet stabilizing agent are reasonably added. The preparation method has the advantages that the reaction tends to be reasonable; the prepared polyurethane elastomer has the features of regular molecular chain structure, low viscosity, little smell, excellent mechanical property and excellent operation property; the abrasion resistance of the polyurethane elastomer is obviously higher than that of the conventional elastomer, the internally produced heat can be effectively reduced, and the polyurethane elastomer is especially suitable for being used in a high-frequency vibration environment.

The invention provides a solar and energy-saving type plant factory and belongs to the technical field of plant factories. The solar and energy-saving type plant factory comprises a factory building,LOW-E (low-emissivity) glass and high-scattering glass, wherein the top of the factory building is provided with an openable automatic roll-up roof system; the LOW-E glass is arranged at the top inside the factory building and under the automatic roll-up roof system; the side walls of the LOW-E glass are connected with the side walls of the factory building; the high-scatting glass is arranged atthe top inside the factory building and under the LOW-E glass; the side walls of the high-scattering glass are in closed connection with the side walls of the factory buildings to enclose a closed planting area; the high-scatting glass and the LOW-E glass are arranged in parallel to define an air flue, one end of the air flue is provided with a cold air device for blowing cold air into the air flue, and the other end of the air flue is provided with a induced draft device for exhausting gas inside the air flue out of the factory building. The solar and energy-saving type plant factory can effectively avoid phenomena inside the factory such as pests and diseases and non-uniformity of applied pesticides, temperature, humidity and concentration of carbon dioxide, thereby ensuring good plant growth.

Elastomer isoprene rubber compositions contain an effective amount of a polyfunctional coupling system (A) as an inorganic-elastomer filler coupling agent, and (B) at least one elastomer of natural or synthetic rubber; (C) an inorganic filler as reinforcing filler; (D) other conventional constituents or additives comprising one or more vulcanizing agent(s), the polyfunctional coupling system being of the constituents (A1) and (A2): (A1) is at least one coupling agent selected from among the functionalized organosilicon compounds of formula (I): [(G⁰)₃SiO_1/2]_m [(G⁰)₂SiO_2/2]_n [G⁰SiO_3/2]_o [Si^O_4/2]_p [(G²)_a(G¹)_a′(Z-CO—N═N—CO-A)SiO_(3-a-a′)/2]_q and (A2) is at least one coupling agent selected among polysulfurated “symmetric” silanes, or sulfurated “asymmetric” silanes.

The invention relates to a tire having a rubber tread of a circumferentially zoned tread including stratified lateral tread zones. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of an intermedial zone positioned between and two stratified lateral tread zones. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated rebound physical properties. The intermedial rubber zone, or layer, overlays a tread base rubber layer and underlies the lateral tread layer zones. The lateral tread zones are stratified in a sense of being separated from each other and also separated from the from the tread base rubber layer by the intermedial rubber layer. The stratified lateral tread zones are peripheral tread zones, or layers.